Anzeige der Dokumente 61-80 von 93

    • Pipe-soil interaction and pipeline performance under strike-slip fault movements 

      Vazouras, P.; Dakoulas, P.; Karamanos, S. A. (2015)
      The performance of pipelines subjected to permanent strike-slip fault movement is investigated by combining detailed numerical simulations and closed-form solutions. First a closed-form solution for the force-displacement ...
    • Pressure effects on the static response of offshore tubular connections 

      Karamanos, S. A.; Anagnostou, G. (2004)
      The paper focuses on the influence of external hydrostatic pressure on the ultimate capacity of uniplanar X and T welded tubular connections under axial and bending loads. Nonlinear finite element tools, calibrated through ...
    • Refined solutions of externally induced sloshing in half-full spherical containers 

      Papaspyrou, S.; Valougeorgis, D.; Karamanos, S. A. (2003)
      A mathematical model is developed for calculating liquid sloshing effects such as hydrodynamic pressures and forces in half-full spherical containers under arbitrary external excitation. The velocity potential is expressed ...
    • Response of half-full horizontal cylinders under transverse excitation 

      Papaspyrou, S.; Karamanos, S. A.; Valougeorgis, D. (2004)
      The present work investigates the response of half full horizontal cylindrical vessels under external excitation in the transverse direction. A two dimensional mathematical model is developed to describe sloshing effects ...
    • SCF equations in multi-planar welded tubular DT-joints including bending effects 

      Karamanos, S. A.; Romeijn, A.; Wardenier, J. (2002)
      Welded tubular connections exhibit significant stress concentrations at the weld vicinity, which may result in fatigue failure. Stress concentration factors (SCFs) in DT-joint are computed, based on an extensive finite ...
    • SCFs and fatigue design of multi-planar tubular DT-joints 

      Karamanos, S. A.; Romeijn, A.; Wardenier, J. (2001)
      The present paper concerns the fatigue design of multi-planar welded tubular DT (double T) steel connections. Stress Concentration Factors (SCFs) are used for the calculation of the hot-spot stress of the joint and, ...
    • SCFs and fatigue design of multiplanar tubular DT joints 

      Karamanos, S. A.; Romeijn, A.; Wardenier, J. (2002)
      This paper concerns the fatigue design of multiplanar welded tubular DT (double T) steel connections. Stress Concentration Factors (SCFs) are used for the calculation of the geometric or hot-spot stress of a DT joint and ...
    • Seismic analysis and design of industrial pressure vessels 

      Diamanti, K.; Doukas, I.; Karamanos, S. A. (2011)
      The present paper focuses on the seismic analysis and design of horizontal-cylindrical and vertical-cylindrical pressure vessels. First, a comparison of the seismic provisions in ASME B&PV code and in EN 13445-3 is conducted ...
    • Seismic design of buried steel water pipelines 

      Karamanos, S. A.; Keil, B.; Card, R. J. (2014)
      The present paper provides an overview of available tools and provisions for the structural analysis and design of buried welded (continuous) steel water pipelines in seismic areas, subjected to earthquake action. Both ...
    • Seismic response of unanchored liquid storage tanks 

      Vathi, M.; Pappa, P.; Karamanos, S. A. (2013)
      Unanchored liquid storage tanks under strong seismic loading may exhibit uplifting of their bottom plate, with significant effects on the dynamic behavior and the structural integrity of the tank. In the present paper, ...
    • Seismic response of unanchored liquid storage tanks 

      Vathi, M.; Karamanos, S. A. (2012)
      Unanchored liquid storage tanks under strong earthquake loading tend to uplift. In the present study, the effects of base uplifting on the seismic response of unanchored tanks are presented with emphasis on elephant's foot ...
    • Simulation of industrial elbow response under strong cyclic loading 

      Varelis, G. E.; Pappa, P.; Karamanos, S. A. (2011)
      Elbow components are widely used in industrial facilities as parts of piping/tubing systems. Their performance under severe loading conditions may be critical for the structural integrity of an industrial facility In the ...
    • Sloshing effects in half-full horizontal cylindrical vessels under longitudinal excitation 

      Papaspyrou, S.; Valougeorgis, D.; Karamanos, S. A. (2004)
      A mathematical model is developed for sloshiug effects in half-full horizontal cylindrical vessels, under external excitation in the direction of the longitudinal vessel axis. In this geometry the problem is not separable. ...
    • Sloshing effects on the seismic design of horizontal-cylindrical and spherical industrial vessels 

      Karamanos, S. A.; Patkas, L. A.; Platyrrachos, M. A. (2006)
      The present paper investigates sloshing effects on the earthquake design of horizontal-cylindrical and spherical industrial vessels. Assuming small-amplitude free-surface elevation, a linearized sloshing problem is obtained, ...
    • Sloshing effects on the seismic design of horizontal-cylindrical and spherical vessels 

      Karamanos, S. A. (2004)
      The paper concerns earthquake-induced sloshing analysis in horizontal-cylindrical and spherical industrial vessels. More specifically, the paper focuses on the calculation of the total force in such vessels, due to horizontal ...
    • Stability of confined thin-walled steel cylinders under external pressure 

      Vasilikis, D.; Karamanos, S. A. (2009)
      The present paper investigates the structural stability of thin-walled steel cylinders surrounded by an elastic medium, subjected to uniform external pressure. A two-dimensional model is developed, assuming no variation ...
    • Stability of long transversely-isotropic elastic cylindrical shells under bending 

      Houliara, S.; Karamanos, S. A. (2010)
      The present paper investigates buckling of cylindrical shells of transversely-isotropic elastic material subjected to bending, considering the nonlinear prebuckling ovalized configuration. A large-strain hypoelastic model ...
    • Steel elbow response under strong cyclic loading 

      Varelis, G. E.; Gresnigt, A. M.; Karamanos, S. A. (2012)
      The present study examines the behavior of steel pipeline elbows subjected to strong cyclic loading conditions. A set of experiments is conducted where in-plane cyclic bending with constant amplitude is applied on the elbow ...
    • Strength and stability of High-Strength Steel tubular beam-columns 

      Pournara, A. E.; Karamanos, S. A.; Ferino, J.; Lucci, A. (2012)
      In this study, the structural behavior of high-strength steel tubular CHS seamless structural members under combined loading of axial compression and bending is examined. The work is mainly numerical supported by a series ...
    • Stress concentrations in tubular DT-joints for fatigue design 

      Karamanos, S. A.; Romeijn, A.; Wardenier, J. (2000)
      The present paper concerns the calculation of stress concentration factors (SCFs) in steel multi-planar welded tubular double T- (DT-) connections, due to axial loads. SCFs are used for the prediction of the hot-spot stress, ...